What is sinister about the 15-minute cities, is that they are promoted as a Green alternative to car congestion and pollution, but in reality these cities are covers for the technocrats to design cities, more resembling prisons, than organic living spaces. Perhaps few people remember the proposal in the 1990s of the multifunction polis, the idea of building a technological city, much like the 15-minute cities, that would be a multiracial Japanese utopia. Of course, after wasting $ 150 million, the project collapsed, being so unrealistic; dedicated activist attacking the idea also helped scare off invertors.
The 15-minute cities are at first glance more realistic, but at the end of the day we have yet to see how in any decent sized city, travel times without cars can be reduced to 15 minutes.